chooseThemeDialog.kt

private fun chooseThemeDialog() {

        val builder = AlertDialog.Builder(this)
        builder.setTitle(getString(R.string.choose_theme_text))
        val styles = arrayOf("Light","Dark","System default")
        val checkedItem = 0

        builder.setSingleChoiceItems(styles, checkedItem) { dialog, which ->

      
        }

        val dialog = builder.create()
        dialog.show()
    }